zCOSMOS红移巡天：环境和恒星质量在形成从z~1上升的形态-密度关系中的作用
The zCOSMOS Redshift Survey: the role of environment and stellar mass in shaping the rise of the morphology-density relation from z~1
摘要：
二十多年来，我们已经知道星系形态分离存在于本地宇宙中。重要的是要了解这种关系是如何随着宇宙时间而演变的。为了研究星系组装是如何随着宇宙时间发生的，我们利用zCOSMOS星系红移巡天中的大约10000个星系，研究了红移z~1的星系形态-密度关系的演化。利用COSMOS巡天中精确的HST/ACS形态、特征良好的zCOSMOS 3D环境和大量光谱红移星系样本，我们希望在这里研究z~1范围内形态-密度关系的演化及其对星系光度和恒星质量的依赖性。该领域的多波长覆盖范围还允许第一次研究星系形态隔离对颜色的依赖。我们进一步试图解开宇宙历史早期或星系生命晚期发生的过程之间的纠缠。zCOSMOS现场受益于高级测量相机（ACS）的F814 W滤波器的高分辨率成像。我们使用标准的形态分类器，优化是强大的对频带偏移和表面亮度变暗，和一个新的，客观的，自动化的方法来转换形态参数到早期，螺旋形，和不规则的类型。我们使用了约10000个IAB =22.5的星系，光谱采样率为33%，从星系群的100 kpc尺度到宇宙网的100 Mpc尺度，对z~1范围内的星系环境进行了描述。删节
英文摘要：
For more than two decades we have known that galaxy morphological segregation is present in the Local Universe. It is important to see how this relation evolves with cosmic time. To investigate how galaxy assembly took place with cosmic time, we explore the evolution of the morphology-density relation up to redshift z~1 using about 10000 galaxies drawn from the zCOSMOS Galaxy Redshift Survey. Taking advantage of accurate HST/ACS morphologies from the COSMOS survey, of the well-characterised zCOSMOS 3D environment, and of a large sample of galaxies with spectroscopic redshift, we want to study here the evolution of the morphology-density relation up to z~1 and its dependence on galaxy luminosity and stellar mass. The multi-wavelength coverage of the field also allows a first study of the galaxy morphological segregation dependence on colour. We further attempt to disentangle between processes that occurred early in the history of the Universe or late in the life of galaxies. The zCOSMOS field benefits of high-resolution imaging in the F814W filter from the Advanced Camera for Survey (ACS). We use standard morphology classifiers, optimised for being robust against band-shifting and surface brightness dimming, and a new, objective, and automated method to convert morphological parameters into early, spiral, and irregular types. We use about 10000 galaxies down to I_AB=22.5 with a spectroscopic sampling rate of 33% to characterise the environment of galaxies up to z~1 from the 100 kpc scales of galaxy groups up to the 100 Mpc scales of the cosmic web. ABRIDGED
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